Milcom Monitoring Post Profiles
- What are Emergency Action Messages (EAM)?
- US Coast Guard Asset Guide - Update 28 Feb 2018
- COTHEN Net - Update 21 March 2018
- Ron Perron Mil/Gov Call Sign - Update September 2017
- UFO Milsat Program
- Fleetsatcom System
- UHF 225-380 MHz Milcom Spectrum Holes
- Civilian Air Cargo/Airline/Military Call Signs
- Intl HF Aero Civ/Gov/Mil Frequency List
- USN Aircraft Modex Numbers
- University of Twente Wide Band WebSDR Netherlands
- U.S. Military ALE Addresses
- DoD Air Refueling Frequencies - Update 15 Jul 2016
- Monitoring the Civil Air Patrol Auxiliary Update 10 Sep 2016
- The Milcom MT Files (1998-2013) Articles Index
- The Spectrum Monitor e-Zine Milcom Column Index
Friday, September 19, 2014
Another UHF Milair Spectrum Hole Frequency Has Biten the Dust
I have been closely tracking frequency usage (or lack of) in the 225-400 MHz milair band for years. When I first started doing this as a young Monitoring Times columnist, I coined the term "spectrum hole."
The 225-400 MHz band frequencies are normally spaced at 25 kHz intervals (except in the milsat subbands). Any lack of activity either reported, listed in official DoD pubs, etc. on any UHF milair freq will result in that freq being listed on my UHF Milair Spectrum Hole list (see our exclusive page at http://mt-milcom.blogspot.com/p/uhf-225-380-mhz-milcom-spectrum-holes.html).
Our close friend Jack Nesmith down in Central Florida yesterday identified some new
activity on one of those spectrum hole frequencies in my list.
277.775 MHz was active with Bolt-43 calling Lightning Ops (6AMW Command Post at MacDill AFB). Normally Lightning Ops uses 311.000 MHz so this would be a new frequency for that Command Post. Maybe this new one was up for the POTUS visit.
At any rate thanks Jack for passing that one along and if you hear any confirmed activity on any of my spectrum holes, please drop me some email at the address in the masthead. I look forward to hearing from you.